pkg_add: Warning: package `digest-20121220' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
pkg_add: Warning: package `rpm-4.11.1' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
pkg_add: Warning: package `bash-4.3' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
bash-4.3: registering info file /usr/pkg/info/bash.info
pkg_add: Warning: package `perl-5.18.2nb1' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
pkg_add: Warning: package `nss-3.16nb1' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
pkg_add: Warning: package `nspr-4.10.4' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
pkg_add: Warning: package `popt-1.16nb1' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
pkg_add: Warning: package `db4-4.8.30' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
pkg_add: Warning: package `libtool-base-2.4.2nb6' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
pkg_add: Warning: package `rpm2pkg-3.2.3' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
pkg_add: Warning: package `checkperms-1.11' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
pkg_add: Warning: package `suse32_compat-12.1nb1' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
pkg_add: Warning: package `suse32_base-12.1nb5' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
suse32_base-12.1nb5: rebuilding run-time library search paths database
suse32_base-12.1nb5: populating /usr/pkg/emul/linux32/dev
suse32_base-12.1nb5: creating symlink /usr/pkg/emul/linux32 -> /emul/linux32
suse32_compat-12.1nb1: rebuilding run-time library search paths database
pkg_add: Warning: package `suse32_x11-12.1' was built for a platform:
pkg_add: NetBSD/x86_64 6.1.3 (pkg) vs. NetBSD/x86_64 6.1.4 (this host)
suse32_x11-12.1: rebuilding run-time library search paths database
===========================================================================
$NetBSD: MESSAGE.NetBSD,v 1.1.1.1 2012/03/21 13:35:50 obache Exp $

Do not forget to include COMPAT_LINUX in your kernel configuration file.
Linux binaries require this option in order to work.

Most Linux binaries also require procfs to be mounted with -o linux.
This can be automated by adding the following to your /etc/fstab:

procfs /emul/linux32/proc procfs ro,linux

Some Linux binaries also require tmpfs to be mounted on /dev/shm.
This can be automated by adding the following to your /etc/fstab:

tmpfs /emul/linux32/dev/shm tmpfs rw,-m1777

===========================================================================